Portion of a shoe outsole



FIG. 1 is a first perspective view of a portion of a shoe outsole showing my new design;

FIG. 2 is a bottom plan view thereof; and,

FIG. 3 is a second perspective view thereof.

The broken line showing of the six enclosed regions in the forefoot area, the five enclosed regions in the rear foot area, and the remainder of the shoe is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a portion of a shoe outsole, as shown and described. 